Painted by Velazquez around 1630, the painting is one of the masterpieces of the Rouen Museum of Fine Arts. Its history, its destiny and the mystery that surrounds it make it one of the most captivating paintings in the history of art. This painting, whose initial subject has been transformed, has changed names several times and has been attributed to a painter other than Velasquez for over a century! How did this painting end up in Rouen? Why did its author change it twelve years later?